CHARACTERIZATION AND FREQUENCY-MEASUREMENT OF A NEW FAR-INFRARED LASER LINE FROM CH2F2

We present the discovery and frequency measurement of a new FIR laser line from CH2F2 optically pumped by a waveguide CO2 laser. This new li ne has the same CO2 laser pump line (9R32), offset (+ 5 MHz) and relat ive polarization (perpendicular to) of the strongest FIR laser line of CH2F2, namely the 184.3 mu m. The frequency is only 19,454 MHz apart from that of this line. We got a frequency measurement of 1,646,196.6 (10) MHz, which corresponds to a wavelength of 182.112 mu m.